Android Project Ideas

Project Details: A simple app that asks users for their height and weight, then shows their Body Mass Index. It’s a great way to get familiar with text inputs, buttons, and basic arithmetic in an Android environment.

How to Do:

• Create a new Android Studio project with an Empty Activity.
• In the layout, add two EditText fields (one for height, one for weight), a Button, and a TextView for the result.
• In the Activity’s code, read user input when the button is tapped, convert it to numbers, compute BMI = weight / (height × height), and display the value in the TextView.
• Add simple validation to ensure inputs aren’t empty or zero.

Features:

• Input fields for height (meters) and weight (kilograms)
• Calculate button
• Display of BMI with two decimal places
• Error message for invalid or missing input

Key Tools & Libraries:

• Android SDK (Java)
• Android Studio UI Designer

Project Source Code: GitHub

Project Details: An app that fetches weather data from the OpenWeatherMap API and displays current conditions plus a short forecast. It follows a Model–View–Presenter pattern to separate the data logic from the user interface.

How to Do:

• Sign up for a free OpenWeatherMap API key.
• Set up Retrofit to make HTTP requests and Gson to parse JSON.
• Build a Presenter class that requests data and passes it to the View (Activity/Fragment).
• Design layouts for current weather, including an icon, temperature, and description.
• Handle permissions and network errors with user feedback.

Features:

• Current weather display (icon, temperature, description)
• 5-day forecast in a RecyclerView
• Pull-to-refresh gesture
• Offline cache of last successful fetch

Key Tools & Libraries:

• Retrofit
• Gson
• MVP architecture
• AndroidX libraries

Project Source Code: GitHub

Project Details: A two-player version of the classic grid game. Users tap on grid cells to place X or O, and the app checks for three-in-a-row wins or a draw.

How to Do:

• Create a 3×3 GridLayout in XML.
• Assign click listeners to each cell view.
• Keep track of the current player and game state in a 2D array.
• After each move, check rows, columns, and diagonals for a win or full board for a draw.
• Show a dialog or Toast to announce results and offer a restart.

Features:

• Tap to place X or O
• Highlight winning line
• Draw detection
• Reset button

Key Tools & Libraries:

• Android SDK (Java)
• GridLayout

Project Source Code: GitHub

Project Details: An application for logging expenses and income entries. It stores records locally and shows a summary of spending and earnings over time. This teaches you about persistent storage and data-driven UI.

How to Do:

• Define an SQLite database or Room entities for transactions (amount, category, date).
• Create DAO interfaces and a RoomDatabase.
• Build an Activity with input fields for new entries and a RecyclerView to list past records.
• Calculate totals and show a pie chart or bar chart of spending per category.
• Allow users to delete or edit transactions.

Features:

• Add, edit, delete entries
• List view of all transactions
• Summary of total income vs. expenses
• Chart of category-wise spending

Key Tools & Libraries:

• Room persistence library
• LiveData & ViewModel (MVVM)
• MPAndroidChart

Project Source Code: GitHub

Project Details: An app that lets users schedule alarms for taking medication. It triggers notifications at set times and keeps a log of taken doses.

How to Do:

• Use Room or SharedPreferences to save medicine names and times.
• Schedule alarms with AlarmManager for each dose time.
• Implement a BroadcastReceiver to catch alarms and show a notification.
• Build a UI to add new medicines, set frequency, and view upcoming reminders.
• Mark doses as taken and record timestamps.

Features:

• Add multiple medicines with custom schedules
• Notifications at each dose time
• Log of when doses were taken
• Snooze or skip options

Key Tools & Libraries:

• AlarmManager & BroadcastReceiver
• Room or SharedPreferences
• Android Notification API

Project Source Code: GitHub

Project Details: A small-scale social network where users can post short updates (“stories”), follow others, and interact through likes and comments. Data is stored in Firebase for real-time updates.

How to Do:

• Set up Firebase Authentication for user sign-up/sign-in.
• Use Firebase Realtime Database or Firestore to store posts, likes, and comments.
• Upload images to Firebase Storage and retrieve URLs.
• Display feeds in RecyclerViews, updating in real time with listeners.
• Allow users to follow or unfollow and filter the feed to show only followed users’ posts.

Features:

• User registration and login
• Create and view posts with images
• Like and comment on posts
• Follow/unfollow users
• Real-time feed updates

Key Tools & Libraries:

• Firebase Authentication
• Firebase Firestore (or Realtime Database)
• Firebase Storage
• Glide or Picasso for image loading

Project Source Code: GitHub

Project Details: A sample project by Google demonstrating best practices for Android apps. It shows how to build a feed-based interface with paging, caching, and user profiles, using modern Jetpack libraries.

How to Do:

• Clone the repo and open it in Android Studio.
• Study how Paging 3 is used to load pages of posts.
• Examine Room setup for local caching and Retrofit for network access.
• Look at ViewModel and LiveData to update the UI.
• Run the app on an emulator to see feed loading, pull-to-refresh, and profile screens.

Features:

• Infinite scrolling feed
• Local cache of posts
• User profile and detail screens
• Pull-to-refresh

Key Tools & Libraries:

• Paging 3
• Room
• Retrofit & Moshi
• LiveData & ViewModel

Project Source Code: GitHub

Project Details: A single repository that hosts several starter projects, such as a calculator, quotes app, Pokémon GO style map demo, and a basic e-commerce layout. It’s meant for experimenting with different parts of Android and Kotlin.

How to Do:

• Fork or clone the repo and open individual modules in Android Studio.
• Explore each folder (e.g., Calculator, Quotes, MapDemo) to see how layouts and code are organized.
• Run the modules one by one to observe behavior.
• Try modifying colors, adding features, or converting Java files to Kotlin.

Features:

• Simple calculator
• Quotes display with swipe gesture
• Map view demo
• E-commerce product list template

Key Tools & Libraries:

• Kotlin
• AndroidX components
• Google Maps SDK (for map demo)
• RecyclerView

Project Source Code: GitHub

Project Details: A private messenger that secures all messages and calls end-to-end. It supports one-to-one and group chats, disappearing messages, file sharing, and HD voice/video calls. Good for learning encryption, real-time data sync, and complex background services.

How to Do:

• Clone the repo and open in Android Studio.
• Fetch submodules and let Gradle sync.
• Configure your debug keystore (or use the provided one) and run on device/emulator.
• Register a test phone number with the Signal service to exchange encryption keys.
• Explore the code paths for messaging, media transfer, and call setup.

Features:

• End-to-end encrypted text, voice, and video
• Disappearing messages
• Group chats and file sharing
• Push notifications via Firebase

Key Tools & Libraries:

• Kotlin
• AndroidX
• libsignal-protocol
• WebRTC
• Room

Project Source Code: GitHub

Project Details: Official Android port of the VLC media player. Plays virtually any audio or video format, supports network streams, and includes a media database for organizing content. Ideal for mastering native libraries and media frameworks.

How to Do:

• Clone the vlc-android repo and its submodules.
• Build LibVLC with the NDK (instructions in README).
• Open the Android project in Android Studio and let Gradle compile both native and Java/Kotlin code.
• Install on device and test local files plus network streams.

Features:

• Broad codec and container support
• Subtitle rendering and track switching
• Network streaming (HTTP, RTSP, etc.)
• Audio equalizer and playback speed control
• Android TV and Chromecast support

Key Tools & Libraries:

• Kotlin
• Android NDK
• LibVLC
• ExoPlayer integration
• AndroidX

Project Source Code: GitHub

Project Details: Offline map and navigation app using OpenStreetMap data. Provides turn-by-turn guidance, custom map styles, GPX track recording, and POI search—all without an internet connection once maps are downloaded.

How to Do:

• Clone the OsmAnd repo and install required Android SDK/NDK versions.
• Use the provided repo manifest to sync modules (repo init/repo sync).
• Open the Gradle project in Android Studio, build, and install.
• Place OSM map files in the device’s storage for offline use.

Features:

• Offline routing for car, bike, pedestrian
• Voice guidance and speed limit warnings
• Custom rendering styles and day/night switching
• GPX track import/export
• POI editing plugin for direct OSM contributions

Key Tools & Libraries:

• Java
• C++
• Android SDK
• Mapsforge
• SQLite
• Gradle

Project Source Code: GitHub

Project Details: An app for contributing to OpenStreetMap through “quests” that ask simple on-site questions (e.g., “Does this stop have a shelter?”). Answers are uploaded directly to OSM, making map editing approachable for newcomers.

How to Do:

• Clone the StreetComplete repo and open it in Android Studio.
• Obtain OSM OAuth credentials and configure them in the app.
• Build and install on device, then grant location and network permissions.
• Tap on nearby quests, answer questions, and watch edits appear in OSM.

Features:

• Quest-based editing with minimal OSM knowledge
• Offline map cache for survey mode
• Real-time upload of edits
• Gamified points and leaderboards

Key Tools & Libraries:

• Kotlin
• MapLibre SDK
• OSM API
• OAuth
• Android Architecture Components
• Coroutines

Project Source Code: GitHub

Project Details: Secure email client offering end-to-end encryption, zero-access architecture, and support for calendars and contacts. Built by Proton for privacy-focused communication.

How to Do:

• Clone the android-mail repo and import into Android Studio.
• Configure ProtonCore modules and API endpoints in Gradle.
• Generate or use provided signing keys and run on device.
• Log in with a Proton Mail account and explore encrypted messaging flows.

Features:

• End-to-end encrypted email and attachments
• Push notifications
• Multi-account support
• Built-in calendar and contact encryption

Key Tools & Libraries:

• Kotlin
• ProtonCore
• Retrofit
• Room
• Dagger

Project Source Code: GitHub

Project Details: Native email client derived from K-9 Mail. Offers a unified inbox, conversation view, folder management, and PGP integration via OpenKeychain.

How to Do:

• Clone the thunderbird-android repo and open in Android Studio.
• Let Gradle download dependencies and sync.
• Run on emulator or device, then add an IMAP/POP3 account.
• Install OpenKeychain to enable PGP encryption.

Features:

• Unified inbox and threaded conversations
• IMAP/POP3 support with IDLE push
• PGP encryption and signatures
• Folder and label management

Key Tools & Libraries:

• Java
• Android SDK
• Apache Commons
• OpenKeychain integration

Project Source Code: GitHub

Project Details: Privacy-focused browser and search app. Blocks trackers, forces HTTPS, and clears all tabs and data with a single tap (“fire” button).

How to Do:

• Clone the duckduckgo/Android repo and run install_tools.sh.
• Open in Android Studio, let Gradle sync, and build.
• Install on a device running Android 5.0+ and explore privacy features.

Features:

• Tracker blocking
• HTTPS Everywhere
• Private search with autocomplete
• Fire button to erase all browsing data
• Customizable app tabs

Key Tools & Libraries:

• Kotlin
• AndroidX
• WebView
• Moshi
• Retrofit
• Espresso tests

Project Source Code: GitHub

Project Details: Demo app for on-device ML tasks: image classification, object detection, and audio recognition using TensorFlow Lite. Shows how to integrate TFLite models and run real-time inference.

How to Do:

• Clone the repo and open the sample module in Android Studio.
• Place TFLite model files in the assets folder (or let Gradle fetch them).
• Grant camera or microphone permissions.
• Build and run on a device to see live inference results.

Features:

• Image classification with pre-trained models
• Real-time object detection
• Audio classification demo
• Model quantization examples and performance metrics

Key Tools & Libraries:

• Java/Kotlin
• TensorFlow Lite
• TensorFlow Lite Task Library
• CameraX

Project Source Code: GitHub